diff --git a/app/api/endpoints/merchant_order.py b/app/api/endpoints/merchant_order.py
index 8706339..8833fbc 100644
--- a/app/api/endpoints/merchant_order.py
+++ b/app/api/endpoints/merchant_order.py
@@ -281,21 +281,25 @@ async def get_order_detail(
     current_user: UserDB = Depends(get_current_user)
 ):
     """获取订单详情"""
-    order = db.query(
+    query = db.query(
         MerchantOrderDB,
         MerchantProductDB.name.label('product_name'),
         MerchantProductDB.image_url.label('product_image'),
         MerchantDB.name.label('merchant_name'),
         MerchantDB.latitude.label('merchant_latitude'),
         MerchantDB.longitude.label('merchant_longitude'),
-        MerchantDB.phone.label('merchant_phone'),
-        text("CASE WHEN :lat IS NOT NULL AND :lon IS NOT NULL THEN "
-             "ST_Distance_Sphere(point(merchants.longitude, merchants.latitude), point(:lon, :lat)) "
-             "ELSE NULL END as distance").params(
-                  lat=latitude, 
-                  lon=longitude
-              ) if longitude and latitude else text("NULL as distance")
-    ).join(
+        MerchantDB.phone.label('merchant_phone')
+    )
+
+    if longitude is not None and latitude is not None:
+        query = query.add_columns(
+            text("ST_Distance_Sphere(point(merchants.longitude, merchants.latitude), "
+                 "point(:lon, :lat)) as distance").params(lon=longitude, lat=latitude)
+        )
+    else:
+        query = query.add_columns(text("NULL as distance"))
+
+    order = query.join(
         MerchantProductDB,
         MerchantOrderDB.merchant_product_id == MerchantProductDB.id
     ).join(
@@ -304,7 +308,8 @@ async def get_order_detail(
     ).filter(
         MerchantOrderDB.order_id == order_id
     ).first()
-    
+
+
     if not order:
         return error_response(code=404, message="订单不存在")
     
@@ -334,7 +339,7 @@ async def get_order_detail(
         "merchant_longitude": order.merchant_longitude,
         "merchant_phone": order.merchant_phone,
         # 距离信息
-        "distance": round(order.distance) if order.distance else None
+        "distance": round(order[7]) if order[7] else None
     }
     
     return success_response(data=order_data)